18980225

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{69019}}^1$

素因数の和:69040

約数の個数: 12

約数和(自身を含む): 25675440

約数和(自身を除く): 6695215

約数列:

[1, 5, 11, 25, 55, 275, 69019, 345095, 759209, 1725475, 3796045, 18980225]

約数ペア:

[(1, 18980225), (5, 3796045), (11, 1725475), (25, 759209), (55, 345095), (275, 69019)]